IllegalStateEx thrown when calling close

[Jed Wesley-Smith]

All,

We have seen the following stacktrace in production with Lucene 2.3.2:
java.lang.IllegalStateException: abort() can only be called when 
IndexWriter was opened with autoCommit=false
   at org.apache.lucene.index.IndexWriter.abort(IndexWriter.java:2009)
   at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1175)
   at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1154)

This is caused by some IndexWriter method catching an OutOfMemoryError 
previously and then aborting the close.

My question is twofold. Firstly, does it make any sense for this to 
happen (it feels like a bug, shouldn't close not call abort if 
autoCommit=true?). Secondly, is there anything I can do to recover 
(should I call flush()?), or can I just ignore it if autoCommit is true?

Following is a test that reproduces the problem:

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.store.RAMDirectory;
import org.junit.Assert;
import org.junit.Test;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.concurrent.atomic.AtomicBoolean;

public class TestIndexWriter {

   @Test public void testOutOfMemoryErrorCausesCloseToFail() throws 
Exception {
       final AtomicBoolean throwFirst = new AtomicBoolean(true);
       final IndexWriter writer = new IndexWriter(new RAMDirectory(), 
new StandardAnalyzer()) {
           @Override public void message(final String message) {
               if (message.startsWith("now flush at close") && 
throwFirst.getAndSet(false)) {
                   throw new OutOfMemoryError(message);
               }
           }
       };
       // need to set an info stream so message is called
       writer.setInfoStream(new PrintStream(new 
ByteArrayOutputStream())); //or better, use NullOS from commons-io
       try {
           writer.close();
           Assert.fail("OutOfMemoryError expected");
       }
       catch (final OutOfMemoryError expected) {}

       // throws IllegalStateEx
       writer.close();
   }
}

thanks for any help,
jed.

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